Supersolids

Package to simulate and animate supersolids. This is done by solving the dimensionless time-dependent non-linear Schrodinger equation for an arbitrary potential. The split operator method with the Trotter-Suzuki approximation is used.

Documentation

https://supersolids.readthedocs.io/en/latest/

Installing

For the animation to work, ffmpeg needs to be installed on your system.

pip

• pip install supersolids

Archlinux

It is provided in the AUR

• git clone https://aur.archlinux.org/python-supersolids.git
• Run "makepkg -sic", where the PKGBUILD lies

Windows

You need to add python to your path (if you didn't do it, when installing python/anaconda).

• Then continue with pip installation

Source

Go to the directory, where the "setup.py" lies.

• For Linux use "python setup.py install --user" from console to build and install the package

Usage

The package uses __main__.py, so it can be run as module. To get help for the flags, run:

• python -m supersolids -h
• python -m supersolids.tools.load_npz -h
• python -m supersolids.tools.simulate_npz -h

To actually run (example):

• python -m supersolids -Res='{"x": 16, "y": 32, "z": 62}' -Box='{"x0": -10, "x1": 10, "y0": -6, "y1": 5, "z0": -8, "z1": 8}'
• python -m supersolids.tools.load_npz -frame_start=79000
• python -m supersolids.tools.simulate_npz -dir_name=movie004 -filename_npz=step_079000.npz

If you use an IDE and your script parameter includes double quotes, escape the double quotes with backslashes, for example:

• "-Res={\"x\": 256}" "-Box={\"x0\": -10, \"x1\": 10}" "-a={\"a_x\": 2.0}" -max_timesteps=51 "-V=lambda x, y, z: 100.0 * np.exp(-(x ** 2 + y ** 2)/ 1.0 ** 2)"

The default path for the results is ~/supersolids/results

Issues

1. Please read the README.md closely.

2. If the issue persist please open an "Issue" in git:

   • Click on "New Issue" on https://github.com/Scheiermann/supersolids/issues.
   • Assign a suitable label.
   • Follow the steps on git the to create the issue. Please describe your issue closely (what are your configurations, did it work before, what have you changed, what is the result, what have you expected as a result?).
   • Try to include screenshots.
   • Describe what you think causes the issue and if you have suggestions how to solve it, mention it!
   • Close the issue, if you accidentally did something wrong (but mention that before closing).

Contributing

Please read the CONTRIBUTING.rst.